JP2010101453A - Guide member, motion guide device, and method of manufacturing guide member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of restricting vibration in a guide member of a motion guide device with a simple structure and a simple method of manufacturing the guide member. <P>SOLUTION: A track rail 142 of a linear motion guide device is structured of: a rail frame part 2 structuring the whole circumstance of the outer periphery with a view from the axial direction; and a vibration control part 3 tightly adhered to the inner wall of the rail frame part 2. Vibration energy caused in the rail frame part 2 is consumed by internal friction of the vibration control part 3 or contact friction between the vibration control part 3 and the rail frame part 2 to restrict vibration of the track rail 142. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motion guide device that supports a moving member via a large number of rolling elements with respect to the guide member, and moves the moving member along the guide member, the guide member, and the manufacture of the guide member. In particular, the present invention relates to a technique for suppressing vibration generated in a guide member.

  As a means for accurately and smoothly guiding a table of a machine tool or an assembly machine, a motion guide device in which a slider is attached to a track rail via a number of rolling elements (for example, balls) has been widely used in recent years. In this type of motion guide device, when the vibration of the track rail that guides the motion of the slider is large, the machining accuracy of the machine tool is lowered, and there is a risk that inconveniences such as lowering the assembly position accuracy in the assembly machine may occur. It was.

  In addition, if the vibration of the track rail after the stop of the slider is slow, for example, in an assembly machine, it is necessary to wait for the vibration to be reduced before moving to the assembly work, which may hinder work time reduction. there were. On the other hand, since the track rail is required to have high rigidity, it has been difficult to make the configuration capable of suppressing the above vibration. This is because a ball spline device in which the outer cylindrical body can be freely moved on the ball spline shaft via a large number of balls, a screw shaft having a spiral ball screw groove on the outer peripheral surface, and a ball screw groove on the inner peripheral surface. The same applies to a ball screw device including a ball nut having a large number of balls and a plurality of balls that are rotatably fitted between ball screw grooves.

  In connection with this, a technique has been proposed in which a hollow portion is formed in the guide shaft, a foam as a sound absorbing material is filled in the hollow portion, and the oscillation sound propagating in the hollow portion is absorbed by the foam. (See Patent Document 1).

  In addition, a hollow portion is formed in the guide shaft, and a middle shaft is inserted with a slight gap left in the hollow portion, and the natural frequency different from that on the inner peripheral surface of the guide shaft that vibrates at a specific natural frequency. A technique is known in which the vibration of the guide shaft is canceled by bringing the middle shaft into contact with each other.

  However, in the technology of filling the hollow portion of the guide shaft with a foam as a sound absorbing material, the sound generated by the vibration of the guide shaft can be absorbed by the foam, and noise can be prevented from propagating to the outside. It was difficult to suppress the vibration of the guide shaft itself. That is, even if the guide shaft, which is a rigid body, vibrates, friction does not occur inside the foam or at the interface between the foam and the guide shaft, and the vibration energy generated in the guide shaft is consumed by the foam. Absent.

Further, in the technique of forming a hollow portion in the guide shaft and inserting a central shaft of a different natural frequency while leaving a slight gap in the hollow portion, a clearance is formed between the guide shaft and the central shaft. Therefore, the vibration energy generated in the guide shaft is difficult to be consumed due to the presence of the middle shaft, and further, the vibration suppressing effect cannot be expected unless the amplitude of the vibration of the guide shaft exceeds the size of the gap.
Japanese Utility Model Publication 2-59318

The present invention has been made to solve the above inconveniences, and an object of the present invention is to provide a technique capable of suppressing vibration in a guide member of a motion guide apparatus with a simple configuration.

  In order to solve the above problems, the present invention is such that the guide member of the motion guide device is composed of a hollow structural member that forms the entire outer periphery when viewed in the axial direction, and an internal member that is in close contact with the inner wall of the hollow structural member. The greatest feature is that vibration is suppressed by consuming vibration energy of the hollow structural member by internal friction of the internal member or contact friction between the internal member and the hollow structural member.

More specifically, a guide member of a motion guide device that forms a trajectory for the motion of the mobile body by supporting the mobile body in the motion guide device so as to be able to reciprocate through a number of rolling elements,
A hollow structural member having a closed cross-sectional structure constituting the entire outer periphery of the guide member as viewed from the axial direction;
The hollow structural member is disposed in the hollow portion inside so that at least a part of its outer wall surface is in close contact with the inner wall of the hollow structural member, and vibration energy of the hollow structural member is absorbed by internal friction or the hollow structural member. Internal members consumed by contact friction of
It is characterized by having.

  Further, the internal member of the present invention is obtained by performing cold drawing on both members in a state where the member to form the internal member is disposed inside the tubular member to form the hollow structural member. It may be deformed so that at least a part of the outer wall surface of the inner member is in close contact with the inner wall of the hollow structural member.

  In the guide member of the present invention, the substantially entire outer wall surface of the inner member may be in close contact with the substantially entire inner wall of the hollow structural member.

  In the guide member of the present invention, the internal member further has a closed cross-sectional structure, and at least a part of the outer wall surface is in close contact with the inner wall of the internal member, and the internal member It is also possible to have a laminated structure in which a further internal member is disposed that consumes the vibration energy by internal friction or contact friction with the internal member. Moreover, you may make it have the said multi-layered laminated structure. Moreover, you may make it the substantially whole surface of the outer wall surface of the said further internal member arrange | positioned in the hollow part inside this internal member closely_contact | adhere to the substantially whole surface of the inner wall of the said internal member.

  In addition, the guide member of the present invention is deformed together by performing a rolling process on both members in a state where the member to form the inner member is disposed inside the tubular member to form the hollow structural member. The outer wall surface of the inner member may be formed so as to be in close contact with the inner wall of the hollow structural member.

  Moreover, you may make it the guide member of this invention make the linear expansion coefficient of the said internal member and the said hollow structure member substantially correspond.

In addition, the present invention provides a guide member according to any one of the above,
A movable body provided movably along the guide member;
A large number of rolling elements interposed between the movable body and the guide member;
It may be a motion guidance device provided with.

Further, the present invention provides an arrangement step of arranging a member to form the internal member inside a tubular member to form the hollow structural member;
A molding step in which the hollow structural member is deformed together by performing cold drawing in a state where the member to form the internal member is disposed inside the tubular member to be formed;
Have
In the molding step, the outer shape of the tubular member is substantially matched with the outer shape of the hollow structural member, and at least a part of the outer wall surface of the inner member is in close contact with the inner wall of the hollow structural member. The manufacturing method of this guide member may be sufficient.

Further, the present invention provides an arrangement step of arranging a member to form the internal member inside a tubular member to form the hollow structural member;
A molding step of deforming together by performing a rolling process in a state where the member to form the internal member is disposed inside the tubular member to form the hollow structural member;
In the forming step, at least a part of the outer wall surface of the inner member may be brought into close contact with the inner wall of the hollow structural member.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration in the guide member of a movement guide apparatus can be suppressed with a simple structure or a manufacturing method.

Example 1
Hereinafter, a guide member, a motion guide device, and a guide member manufacturing method according to the present invention will be described in detail with reference to the drawings. The motion guide device according to the first embodiment of the present invention is a linear motion guide device, and as shown in FIG. 1, a track rail 142 as a guide member and a movement as a moving body that moves along the track rail 142. Block 141. A large number of balls (rolling elements) B are provided between the track rail 142 and the moving block 141 so as to freely roll.

  As shown in FIG. 2, the track rail 142 has a substantially rectangular cross section. A pair of upper and lower ball rolling grooves 143 and 144 are formed in the left and right side surfaces 142c and 142d of the track rail 142 along the longitudinal direction. The moving block 141 has a connecting portion 145 and a pair of left and right sleeve portions 146 and 147 suspended downward from both sides thereof, and has a recess on the lower surface side. A pair of upper and lower ball rolling grooves 148 and 149 are formed in the sleeve portions 146 and 147 of the moving block 141 along the longitudinal direction at positions corresponding to the ball rolling grooves 143 and 144 of the track rail 142. Yes.

  The moving block 141 is formed with a pair of upper and lower unloaded ball holes 150 and 151 adjacent to and corresponding to the pair of upper and lower ball rolling grooves 148 and 149. Yes. The front and rear end faces of the moving block 141 are lids having ball direction change passages that connect the end portions of the ball rolling grooves 148 and 149 and the unloaded ball holes 150 and 151 to each other to form an infinite circulation passage on the inner surface side. Members 152 and 152 are attached. A large number of balls B circulate in each infinite circulation path and are transferred while applying a load between the ball rolling grooves 143 and 144 of the track rail 142 and the ball rolling grooves 148 and 149 of the moving block 141. It is supposed to be.

  The ball rolling grooves 143, 144, 148, and 149 are circular grooves whose cross-sectional shape is formed as a curved surface as a single arc having a radius larger than the ball radius, and the ball rolling grooves 143, 144, 148 are formed. , 149 has only one contact surface on which the ball B rolls.

Here, since the conventional track rail is formed of steel or stainless steel, high rigidity and durability can be obtained, but there is a case where the vibration control performance is lacking. For example, when the linear motion guide device shown in FIG. 1 is used for a machine tool or an assembly device, it may be difficult to maintain processing accuracy and positioning accuracy due to vibration. In addition, when the damping of the vibration after the moving block stops is slow, it is necessary to assemble the parts after waiting for the damping of the vibration in the moving block in the assembling apparatus, resulting in a decrease in work efficiency. On the other hand, in this embodiment, a plurality of members are cold-drawn together to form the track rail 142, and the vibration of the track rail 142 is caused by friction or internal friction between the plurality of members. By consuming energy, the vibration control property of the track rail 142 is improved.

  A detailed configuration of the track rail 142 in the present embodiment will be described with reference to FIG. FIG. 3A shows the steel pipe material 102 and the vibration control member 103 on which the track rail 142 is to be formed before cold track drawing is performed to form the track rail 142. FIG. 3B shows a cross section of the track rail 142 after the cold drawing process. The track rail 142 includes a rail outer shell portion 2 as a hollow structural member formed by the steel pipe material 2, and a vibration control member 103 plastically deformed so that an outer wall surface of the rail outer shell portion 2 extends to the inner wall of the rail outer shell portion 2. It is comprised by the vibration control part 3 as an internal member formed closely (closely).

  In addition, close in this embodiment means a state in which the inner wall of the rail outer shell portion 2 as a hollow structural member and the outer wall surface of the vibration control portion 3 as an inner member are in contact with each other without a gap. Further, the close contact means a state in which the inner wall of the rail outer shell portion 2 as a hollow structural member and the outer wall surface of the vibration control portion 3 as an internal member are in contact with each other without leaving a gap. The meaning of the terms “close” and “close” can be similarly interpreted in the following examples. Further, in this embodiment, as described above, the inner wall of the rail outer shell portion 2 and the outer wall surface of the vibration control portion 3 are in close contact (close contact) over the entire circumference. This corresponds to the fact that the substantially entire surface of the outer wall is closely (closely) adhered to the substantially entire surface of the inner wall of the hollow structural member. This does not necessarily indicate that the inner wall of the rail outer shell portion 2 as a hollow structural member and the outer wall surface of the vibration control portion 3 as an inner member are completely in close contact (adherence) over the entire surface. It is not excluded that a minute gap is generated partially.

  As shown in FIG. 3 (a), the cross-sectional shape is close to the shape of the hollow portion of the final steel pipe material 2 after cold drawing inside the steel pipe material 102 having a circular cross section before processing, In addition, a vibration control member 3 made of a metal material having vibration control is provided. As a material of the vibration control member 3, for example, Star Silent (registered trademark, manufactured by Daido Special Steel Co., Ltd.) can be used in addition to the Mg—Zr alloy, Al—Zn alloy, and Mg alloy. The characteristic of this damping member 3 is that vibration energy applied from the outside can be efficiently consumed by internal friction. In addition, it turns out that the frequency from which the damping efficiency of vibration becomes high differs with the material illustrated previously as a material of the damping member 3. FIG. Therefore, the vibration of the track rail 142 can be more efficiently suppressed by selecting the damping member 3 that exhibits a higher damping efficiency at the frequency at which vibration is to be suppressed as the track rail 142 or the natural frequency of the track rail 142. Can do.

  In the present embodiment, cold drawing is performed in a state where the damping member 3 is disposed inside the steel pipe material 2, and the shape shown in FIG. Thereafter, induction hardening and post-processing by grinding are performed on the portion where the ball B comes into contact. Thus, the track rail 142 is formed.

In FIG. 4, the steel pipe material 102 and the vibration control member 103 are passed through the die 200 to perform cold drawing, and the rail outer shell portion 2 and the vibration control portion 3 are formed. In addition, the shape of the die 200 can be obtained by deforming the steel pipe material 102 to obtain the outer shape of the track rail 142, and as shown in FIG. 3B, the outer wall of the vibration control portion 3 and the rail outer shell portion 2 are formed. The inner wall is determined in consideration so as to be in close contact (close contact) over the entire circumference. In addition, the shape of the die 200, the drawing speed of the steel pipe material, and the like are set so that the damping characteristics of the damping member 103 are not changed by the plastic working stress acting on the damping member 103 during cold drawing. In addition, when performing intermediate heating, the heating temperature is also set so that the damping characteristics of the damping member 103 do not change.

  In the track rail 142 according to this configuration, vibration caused by external force or impact acting on the rail outer shell portion 2 passes through the interface between the rail outer shell portion 2 and the vibration control portion 3, and the vibration control portion. 3 propagates inside. And vibration energy is consumed mainly by the friction (internal friction) between the internal structures of the damping part 3, and a vibration is suppressed.

  In the present embodiment, the thickness of the rail outer shell portion 2 (or the steel pipe material 102) may be determined in advance as a thickness within a range in which heat during quenching does not affect the vibration control portion 3. Further, the surface roughening treatment may be performed on the inner wall of the steel pipe material 102 or the outer wall of the vibration control member 103 in advance. Thereby, in the state shown in FIG.3 (b), it becomes possible to heighten the coupling | bonding force of the interface of the rail outer shell part 2 and the damping part 3 more. If it does so, since the vibration energy of the rail outer shell part 2 will propagate to the damping part 3 more efficiently, it becomes possible to obtain the damping effect more efficiently.

  In the above-described embodiment, the cross-sectional shape of the vibration control member 103 is processed into a shape close to the predicted cross-sectional shape of the vibration control unit 3 before cold drawing. This is because, in general, when cold-drawing a steel pipe material, it is known that good workability can be obtained by arranging a metal core close to the cross-sectional shape after processing inside the steel pipe material. Since the damping member 103 in the above embodiment also has the function of the core bar, the outer shape of the track rail 142 can be formed more precisely. On the other hand, when the vibration control member 103 is formed of a material that is easier to plastically process, the cross-sectional shape of the vibration control member 203 may be circular as shown in FIG. According to this, the track rail 142 is formed by a simpler operation of inserting the damping member 203 having a circular cross-sectional shape that is generally available into the steel pipe material 102 and cold-drawing them together. It becomes possible.

  Further, in the above embodiment, the step of arranging the vibration control member 103 or 203 inside the steel pipe material 102 corresponds to the arrangement step. A process of performing cold drawing in a state where the damping member 103 or 203 is disposed inside the steel pipe material 102 corresponds to a forming process.

(Example 2)
Next, a second embodiment of the present invention will be described. In the present embodiment, an example in which cold drawing is performed on the track rail 142 in a state where the steel pipe material 113 is disposed inside the steel pipe material 112 will be described.

  In the present embodiment, a second steel pipe material 113 is arranged in the steel pipe material 112, not a vibration damping member having particularly excellent vibration damping performance. And the cold drawing process is given to both in the state. Thereby, the track rail 142 is formed.

  In the track rail 142 in the present embodiment, when vibration generated in the rail outer shell portion 12 propagates to the vibration control portion 13, the inner wall of the rail outer shell portion 12 as a hollow structural member and the vibration control portion 13 as an internal member. The outer wall surface is relatively displaced, and vibration energy is consumed by friction at the interface between the two.

According to the present embodiment, the track rail 142 having excellent seismic control characteristics is obtained by a simple configuration and manufacturing method in which the common steel pipe materials 112 and 113 having high availability are arranged twice and cold drawing is performed. Can be formed. Here, the material of the steel pipe material 112 and the steel pipe material 113 may be the same. Then, since the linear expansion coefficient of both can be made to correspond completely, it is possible to stabilize the temperature characteristic of vibration control. Further, the material of the steel pipe material 112 and the steel pipe material 113 may be changed. As a result, the difference between the resonance frequencies of the two can be set large, and the vibration can be attenuated more efficiently at the resonance point of the rail outer shell portion 12. Further, as the material of the steel pipe material 113, the material having high vibration control properties described in the first embodiment may be used. If it does so, the vibration energy of the vibration which arose in the rail outer shell part 12 will be consumed more efficiently as friction both in the interface of the damping part 13 and the rail outer shell part 12, and the inside of the damping part 13. It is possible to obtain a higher vibration control effect.

  In addition, in FIG. 6, although the steel pipe material 112 and the steel pipe material 113 were arrange | positioned twice and the example which performed cold drawing processing was demonstrated, as shown in FIG. 7, still more steel pipe materials 112-114 are shown. May be stacked to form a laminated structure. Thereby, the friction between the inner wall of the steel pipe 12 after the rail outer shell processing and the outer wall surface of the damping part 13 and the friction between the inner wall of the damping part 13 and the outer wall surface of the damping part 14 are caused. Vibration energy can be consumed, and vibration generated in the rail outer shell portion 13 can be damped more efficiently. Further, it is possible to perform cold drawing by arranging more steel pipe members.

  In the above embodiment, the present invention has been described by taking the track rail 142 of the linear motion guide device 1 shown in FIG. 1 as an example of the motion guide device and the guide member. However, the motion guide device is not limited to a straight motion guide device. Further, the guide member is not limited to the track rail. For example, the present invention can be applied to a case where a ball spline device or a ball screw device is used as the motion guide device, and a ball spline shaft or a ball screw shaft is used as the guide member.

  Of course, the steel pipe materials 102, 112, 113, and 114 in the above embodiments may be formed of stainless steel.

  In the above-described embodiment, the rail outer shell portions 2 and 12 and the vibration control portions 3 and 13 in the track rail 142 are in close contact with the entire circumference of the inner walls of the rail outer shell portions 2 and 12 ( The substantially entire outer wall surface of the inner member was in close contact with the substantially entire inner wall of the hollow structural member). As a result, the contact area between the internal member and the hollow structural member is increased, so that vibration can be more efficiently suppressed. However, in the present invention, the hollow structural member and the internal member do not necessarily need to be in close contact over the entire circumference of the inner wall of the hollow structural member. As long as at least a part of the inner wall of the hollow structural member is in close contact with the internal member, the effects of the present invention can be obtained to some extent.

(Example 3)
Next, an example will be described in which the present invention is applied to the case of rolling a ball screw groove on a ball screw shaft. FIG. 8 shows a schematic configuration of the linear motion guide device 20 in the present embodiment. FIG. 8A is a diagram of the linear motion guide device 20 viewed from the axial direction, and FIG. 8B is a diagram viewed from the direction perpendicular to the axis. The linear motion guide device 20 is a ball screw device including a nut 161 and a ball screw shaft 162. In this ball screw device, the load ball rolls and moves in a ball transfer groove 162a provided in the ball screw shaft 162 and a ball transfer groove (not shown) provided in the nut 161 while receiving an axial load. The nut 161 smoothly performs linear motion along the ball screw shaft 162.

  The ball screw shaft 162 as a guide member shown in FIG. 8 is formed by attaching a ball screw groove 162a to a steel pipe material by rolling. Moreover, induction hardening is given to a steel pipe material after a rolling process. In the present embodiment, the rolling process is performed in a state in which the columnar damping member 123 is disposed inside the steel pipe member 122 where the ball screw shaft 162 is to be formed. As a material of the damping member 123, the material exemplified as the material of the damping member 2 in the first embodiment can be used.

FIG. 9A shows a steel pipe material 122 and a vibration control member 123 before rolling in this embodiment. FIG. 9B shows the screw shaft outer shell portion 22 and the vibration control portion 23 of the ball screw shaft 162 formed by rolling. In this embodiment, when the ball screw groove 162a is attached to the steel pipe member 122 by rolling, a spiral ridge 22a corresponding to the ball screw groove 162a is generated on the inner wall of the screw shaft outer shell portion 22. . When the ridge 22a is generated, the ridge 22a bites into the damping member 123, so that a portion corresponding to the ridge 22a in the damping member 123 is plastically deformed inward, and the ridge 22a and the damping are formed. The seismic member 123 is tightly coupled and in close contact. In FIG. 9B, there is a gap between the screw shaft outer shell portion 22 and the vibration control portion 23 at a portion other than the protrusion 22a of the screw shaft outer shell portion 22, Depending on the ductility of the damping member 123, the above-described gap may not exist due to the ridge 22a biting in. In this case, the adhesion between the screw shaft outer shell portion 22 and the vibration control portion 23 can be further increased.

  In the ball screw shaft 162 according to this configuration, vibration caused by external force or impact acting on the screw shaft outer shell portion 22 passes through the interface between the screw shaft outer shell portion 22 and the vibration control portion 23. Propagates inside the vibration control part 23. And vibration energy is consumed mainly by the friction (internal friction) between the internal structures of the vibration control part 23, and a vibration is suppressed. Therefore, the vibration of the ball screw shaft 162 in the linear motion guide device 20 can be suppressed with a simple configuration and manufacturing method.

Next, FIG. 10 shows a case where the ball screw shaft 162 is formed by rolling the two steel pipe members 133 inside the steel pipe member 132 and rolling them. FIG. 10A shows a state before the rolling process, and FIG. 10B shows a state after the rolling process. In this example, when the ridge 32a is generated on the inner wall of the screw shaft outer shell portion 32 by rolling, the portion corresponding to the ridge 32a in the steel pipe material 133 is plastically deformed inward to form the vibration control portion 33. Is done.

  In the ball screw shaft 162 according to the present embodiment, when the vibration generated in the screw shaft outer shell portion 32 propagates to the vibration control portion 33, the protrusions 32a on the inner wall of the screw shaft outer shell portion 32 as the hollow structural member The outer wall surface of the damping part 33 as a member is relatively displaced, and vibration energy is consumed by friction at the interface between the two.

  According to the present embodiment, the ball screw shaft 162 having excellent seismic control performance is obtained by a simple configuration and manufacturing method in which common steel pipe materials 132 and 133 having high availability are doubled and rolled. Can be formed.

  In this embodiment, the thickness of the screw shaft outer shell portions 22 and 32 (or the steel pipe materials 122 and 132) is determined in advance as a thickness within a range in which the heat during quenching does not affect the vibration control portions 23 and 33. May be. Further, the inner wall of the steel pipe member 122 or the outer wall surface of the vibration control member 123 may be subjected to surface roughening treatment in advance.

  In the present embodiment, the step of arranging the vibration control member 123 or the second steel pipe member 133 inside the steel pipe members 122 and 132 corresponds to an arrangement step. The process of performing the rolling process in a state in which the damping member 123 or the second steel pipe 133 is disposed inside the steel pipes 122 and 132 corresponds to a forming process.

  In addition, in FIG. 10, although the example which performed the rolling process by arrange | positioning the steel pipe material 132 and the 2nd steel pipe material 133 in duplicate was demonstrated, more steel pipe materials are piled up and laminated | stacked structure It doesn't matter.

  Of course, the steel pipe members 122, 132, and 133 in this embodiment may be formed of stainless steel.

  In the present embodiment, in the ball screw shaft 162, the screw shaft outer shell portions 22, 32 and the vibration control portions 23, 33 are in close contact with each other around the ridges 22a, 32a of the screw shaft outer shell portions 22, 32. Was. As a result, the contact area between the internal member and the hollow structural member is increased, so that vibration can be more efficiently suppressed. However, in the present invention, the hollow structural member and the internal member do not necessarily need to be in close contact over the entire circumference of the inner wall of the hollow structural member. As long as at least a part of the inner wall of the hollow structural member is in close contact with the internal member, the effects of the present invention can be obtained to some extent.

It is an external appearance perspective view of the linear motion guide apparatus which concerns on Example 1 of this invention. It is a front view including the partial cross section figure of the linear motion guide apparatus which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view which shows the state before cold drawing of the track rail which concerns on Example 1 of this invention, and the state after a process. It is a figure for demonstrating the mode of the cold drawing processing which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view which shows the other example of the state before the cold drawing process of the track rail which concerns on Example 1 of this invention, and the state after a process. It is a longitudinal cross-sectional view which shows the state before cold drawing of the track rail which concerns on Example 2 of this invention, and the state after a process. It is a longitudinal cross-sectional view which shows the other example of the state before the cold drawing process of the track rail which concerns on Example 2 of this invention, and the state after a process. It is a figure which shows the linear motion guide apparatus which concerns on Example 3 of this invention. It is a cross-sectional view which shows the state before a rolling process of the ball screw shaft which concerns on Example 3 of this invention, and the state after a process. It is a cross-sectional view which shows the other example of the state before the rolling process of the ball screw shaft which concerns on Example 3 of this invention, and the state after a process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Linear motion guide apparatus, 2 Rail outer shell part, 3 Damping part, 12 Rail outer shell part, 13 Damping part, 14 Damping part, 20 Linear motion guiding apparatus, 22 Screw shaft outer shell part, 22a Convex line, 23 Damping part, 32 Screw shaft outer shell part, 32a Convex strip, 33 Damping part, 102 Steel pipe material, 103 Damping member, 112 Steel pipe material, 113 Steel pipe material, 114 Steel pipe material, 122 Steel pipe material, 123 Damping member , 132 Steel pipe material, 133 Steel pipe material, 141 Moving block, 142 Track rail, 152 Lid member, 161 Nut, 162 Ball screw shaft, 162a Ball screw groove, 200 dies

Claims (10)

A movement guide apparatus guide member that forms a trajectory for movement of the moving body by supporting the moving body in the movement guide apparatus so as to be able to reciprocate through a plurality of rolling elements,
A hollow structural member having a closed cross-sectional structure constituting the entire outer periphery of the guide member as viewed from the axial direction;
The hollow structural member is disposed in the hollow portion inside so that at least a part of its outer wall surface is in close contact with the inner wall of the hollow structural member, and vibration energy of the hollow structural member is absorbed by internal friction or the hollow structural member. Internal members consumed by contact friction of
A guide member comprising:   In a state where the member to form the inner member is arranged inside the tubular member to form the hollow structural member, both members are deformed together by cold drawing, and the outer wall surface of the inner member is formed. The guide member according to claim 1, wherein at least a part of the guide member is formed in close contact with an inner wall of the hollow structural member. The guide member according to claim 1, wherein substantially the entire outer wall surface of the inner member is in close contact with the substantially entire inner wall of the hollow structural member.   The inner member further has a closed cross-sectional structure, and at least a part of the outer wall surface is in close contact with the inner wall of the inner member in the hollow portion inside the inner member so that the vibration energy of the inner member is internally frictioned or the inner The guide member according to any one of claims 1 to 3, wherein the guide member has a laminated structure in which a further inner member is disposed due to contact friction with the member.   5. The guide member according to claim 4, wherein a substantially entire surface of an outer wall surface of the further inner member disposed in a hollow portion inside the inner member is in close contact with a substantially entire surface of the inner wall of the inner member.   In a state where the member to form the inner member is disposed inside the tubular member to form the hollow structural member, both members are deformed by performing a rolling process on the outer wall surface of the inner member. The guide member according to claim 1, wherein at least a part is formed so as to be in close contact with an inner wall of the hollow structural member.   The guide member according to any one of claims 1 to 6, wherein linear expansion coefficients of the internal member and the hollow structural member are substantially matched. A guide member according to any one of claims 1 to 7,
A movable body provided movably along the guide member;
A large number of rolling elements interposed between the movable body and the guide member;
An exercise guide device comprising: An arrangement step of disposing a member to form the internal member inside a tubular member to form the hollow structural member;
A molding step in which the hollow structural member is deformed together by performing cold drawing in a state where the member to form the internal member is disposed inside the tubular member to be formed;
Have
The molding step is characterized in that the outer shape of the tubular member substantially matches the outer shape of the hollow structural member, and at least a part of the outer wall surface of the inner member is in close contact with the inner wall of the hollow structural member. Item 2. A method for manufacturing a guide member according to Item 1. An arrangement step of disposing a member to form the internal member inside a tubular member to form the hollow structural member;
A molding step of deforming together by performing a rolling process in a state where the member to form the internal member is disposed inside the tubular member to form the hollow structural member;
Have
The method for manufacturing a guide member according to claim 1, wherein in the molding step, at least a part of the outer wall surface of the inner member is brought into close contact with the inner wall of the hollow structural member.

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